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krok68 [10]
4 years ago
10

Two times the sum of nine and a number is the opposite of 9. Write an equation and solve.

Mathematics
1 answer:
MrMuchimi4 years ago
8 0
- - 2*-9x

This is because you have "two times" which is 2*

The sum of a number = x
 
Opposite of 9 = -9

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